<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Fixed</title>
    <style>
        .fixed {
            position: fixed;
            bottom: 0;
            right: 0;
            width: 200px;
            background-color: crimson;
        }
    </style>
</head>
<body>
<div class="fixed">
    我是Fixed!!
</div>
</body>
</html>